Telephony: Fix Mms auto-retrieval

This adds some missing code from the 10.1 port

Change-Id: I57093d0dfbc00478b2835324e740da9d75c111d6

Conflicts:

	src/java/com/android/internal/telephony/dataconnection/DcTracker.java
Merge pull request #5 from fairct/49189

Telephony: Fix Mms auto-retrieval